a
  • Alfa:锗棒, 多晶硅, 6.35mm (0.25in) 直径, 99.9999% (metals basis)
  • Alfa:锗棒, 多晶硅, 6.35mm (0.25in) 直径, 99.9999% (metals basis)
b

Alfa:锗棒, 多晶硅, 6.35mm (0.25in) 直径, 99.9999% (metals basis)

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